Alexander beyoe



(No Model.)

A. BRYCE.

AUTOMATIC GAS GUT-OFF. No. 372,960. Patented Nov. 8, 1887.

N. PETERS. Plmlodilhogmphur. Waihingmn. Du;

UNITED STATES PATENT OFFICE.-

ALEXANDER BRYCE, OF TORONTO, ONTARIO, CANADA.

AUTOMATIC GAS CUT-OFF.

. SPECIFICATION forming part of Letters Patent No. 372,960, dated November 8, 1887.

Application filed February 8, 1887. Serial No. 226,974. (No model.)

To aZZ whom it may concern.

Be it known that I, ALEXANDER BRYCE, of the city of Toronto, in the county of York, in theProvince of Ontario, Canada, builder, have invented a certain new and useful Automatic Out-Off for Gas-Burners, of which the following is a specification.

This invention relates to automatic cutoffsfor gas-burners; and it consists in the-peculiar combinations and the construction, arrangement, and adaptation of parts, all as more fully hereinafter described and claimed.

Figure 1 is a perspective view showing the pivoted'weighted lever as it will appear when set to turn ofi'the gas. Fig. 2 is a similar view, but showing the pivoted Weighted lever in the position it will be during the period that the gas islighted. Fig. 3 is a similar view showing the position of the pivoted weighted lever after it has fallen off its support to cut off the gas from the burner.

A is an ordinary gas burner.

B is a lever pivoted to the cock 0, and having a weight, D, at its opposite end.

E is an arm fixed to the burner A, and hav ing a beveled end, a, as indicated.

F is a bar pivoted at b to the burner A, and connected on one side of its pivot to the rod G, which may be madeofsteel or an yothersuitable metal, and is supported close to the. burner A by a bracket, H, fastened to the burner A, but sufficiently far from it to prevent it being materially affected by the flame when the burner is lighted.

In order to light the gas, it is necessary to raise the lever B and rest it upon the arm E. When the gas is lighted, the heat of the flame causes the rod G to expand, and as its supportingbracket H is not close enough to the burner to be similarlyacted upon by the flame the expansion of the rodG will of course push down the end of the pivoted bar F, to which it is attached, and as the other end of this bar F extends below the lever B it, in rising, pushes the said lever 13 off its supporting-arm E; but as the projection 11, formed on the end of the bar F, extends below the pivoted lever B-the said lever is caught by the said projection, which supports it, as indicated in Fig. 2.

It will be noticed that the end of the bar F is beveled back from the projection d, the said end of the bar F being thus shaped so that its top .side will not project below the lever B, although its beveled end does. Consequently, when the bar Fis moved on its pivot by the expansion of the rod G, the lever B is pushed off the end of its supporting-arm E by the beveled end of the bar F, but is caught by the projection d, which continues to support it, as shown in Fig. 2, until the flame is extinguished, when the rod G will cool, and in contracting will so operate the pivoted bar F that its beveled end, on which the projection d is formed, is tilted down so that the pivoted lever B will fall off the projection d, its weight-D causing 'it to assume the position in which it is shown in Fig. 3 when the cock O is' turned off, so as to cut off the supply of gas from the burner.

From this description it will be seen that the supply of gas is cut off from the burner immediately after the flame is extinguished, should it be blown or otherwise accidentally put out.

What I claim as my invention is-' 1. The combination, with the gas-burner, an arm attached thereto, and a weighted lever connected to the cock of said burner and sup ported by said arm when the cock is open, of a pivoted bar, F, formed at one end with projection d, and the rod G, connected to said bar and held in proximity to the burner, substantially as described.

2. The combination, with the burner, the arm E, attached thereto and provided with beveled end a, and the weighted lever connected to the cock of said burner, of the bar F, pivoted to said burner parallel with the arm E and formed with projection d, and beveled back of said projection, and the rod G, connected to one end of said bar and arranged in proximity to the burner, substantially as described.

Toronto, January 28, 1887.

-ALEXR. BRYCE. 

